The charity’s fundraising initiative will take place on Sunday (10 May), and sees riders cycle across up to 16 London bridges on one of three routes. Now in its 22nd year, over 3,000 people are expected to take part this weekend covering an eight, 34 or 50-mile route.

The Stroke Association is one of Vision Express’ charity partners and Mr Macdonald is taking part in the challenge as a volunteer for the multiple.

Other celebrities signed up for the ride include television presenter Anna Richardson and actor James Norton.

Vision Express regional manager, Keith Tomlinson, who will take part in the ride, commented: “At Vision Express we’re extremely proud of the partnership with the Stroke Association and it’s an important relationship, given that up to two thirds of stroke survivors will experience some form of visual problems.

“It’s a privilege to literally go the extra mile to show our support for stroke survivors by getting in the saddle and taking up the challenge.”

Director of fundraising at the Stroke Association, Jim Swindells, added: “At the Stroke Association we believe in life after stroke and the Thames Bridges Bike Ride is our most significant fundraising event, which celebrates just that.

“We are the only UK-wide charity supporting stroke survivors of all ages and we rely on the generosity of others. It’s fantastic to have Vision Express on board providing their valuable support, and wonderful that the team will take to their bikes alongside Julien Macdonald and enjoy the day.”